67672757 has 2 divisors, whose sum is σ = 67672758. Its totient is φ = 67672756.

The previous prime is 67672723. The next prime is 67672763. The reversal of 67672757 is 75727676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41036836 + 26635921 = 6406^2 + 5161^2 .

It is a cyclic number.

It is not a de Polignac number, because 67672757 - 2²² = 63478453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67672777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33836378 + 33836379.

It is an arithmetic number, because the mean of its divisors is an integer number (33836379).

Almost surely, 2^67672757 is an apocalyptic number.

It is an amenable number.

67672757 is a deficient number, since it is larger than the sum of its proper divisors (1).

67672757 is an equidigital number, since it uses as much as digits as its factorization.

67672757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864360, while the sum is 47.

The square root of 67672757 is about 8226.3453003141. The cubic root of 67672757 is about 407.5097055663.

The spelling of 67672757 in words is "sixty-seven million, six hundred seventy-two thousand, seven hundred fifty-seven".